/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.netease.arctic.flink.util;

import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.JobID;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.runtime.externalresource.ExternalResourceInfoProvider;
import org.apache.flink.runtime.io.disk.iomanager.IOManager;
import org.apache.flink.runtime.io.disk.iomanager.IOManagerAsync;
import org.apache.flink.runtime.jobgraph.JobVertexID;
import org.apache.flink.runtime.memory.MemoryManager;
import org.apache.flink.runtime.memory.MemoryManagerBuilder;
import org.apache.flink.runtime.metrics.groups.TaskMetricGroup;
import org.apache.flink.runtime.metrics.groups.UnregisteredMetricGroups;
import org.apache.flink.runtime.operators.testutils.MockEnvironment;
import org.apache.flink.runtime.operators.testutils.MockInputSplitProvider;
import org.apache.flink.runtime.state.TaskStateManager;
import org.apache.flink.runtime.state.TestTaskStateManager;
import org.apache.flink.runtime.taskexecutor.GlobalAggregateManager;
import org.apache.flink.runtime.taskmanager.TaskManagerRuntimeInfo;
import org.apache.flink.runtime.throughput.ThroughputCalculator;
import org.apache.flink.runtime.util.TestingTaskManagerRuntimeInfo;
import org.apache.flink.runtime.util.TestingUserCodeClassLoader;
import org.apache.flink.util.UserCodeClassLoader;

public class MockEnvironmentBuilder {
  private String taskName = "mock-task";
  private MockInputSplitProvider inputSplitProvider = null;
  private int bufferSize = 16;
  private TaskStateManager taskStateManager = new TestTaskStateManager();
  private GlobalAggregateManager aggregateManager = new TestGlobalAggregateManager();
  private Configuration taskConfiguration = new Configuration();
  private ExecutionConfig executionConfig = new ExecutionConfig();
  private int maxParallelism = 1;
  private int parallelism = 1;
  private int subtaskIndex = 0;
  private UserCodeClassLoader userCodeClassLoader = TestingUserCodeClassLoader.newBuilder().build();
  private JobID jobID = new JobID();
  private JobVertexID jobVertexID = new JobVertexID();
  private TaskMetricGroup taskMetricGroup = UnregisteredMetricGroups.createUnregisteredTaskMetricGroup();
  private TaskManagerRuntimeInfo taskManagerRuntimeInfo = new TestingTaskManagerRuntimeInfo();
  private IOManager ioManager;
  private MemoryManager memoryManager = this.buildMemoryManager(33554432L);
  private ExternalResourceInfoProvider externalResourceInfoProvider;
  private ThroughputCalculator throughputCalculator;

  public MockEnvironmentBuilder() {
    this.externalResourceInfoProvider = ExternalResourceInfoProvider.NO_EXTERNAL_RESOURCES;
  }

  private MemoryManager buildMemoryManager(long memorySize) {
    return MemoryManagerBuilder.newBuilder().setMemorySize(memorySize).build();
  }

  public MockEnvironmentBuilder setTaskName(String taskName) {
    this.taskName = taskName;
    return this;
  }

  public MockEnvironmentBuilder setManagedMemorySize(long managedMemorySize) {
    this.memoryManager = this.buildMemoryManager(managedMemorySize);
    return this;
  }

  public MockEnvironmentBuilder setInputSplitProvider(MockInputSplitProvider inputSplitProvider) {
    this.inputSplitProvider = inputSplitProvider;
    return this;
  }

  public MockEnvironmentBuilder setBufferSize(int bufferSize) {
    this.bufferSize = bufferSize;
    return this;
  }

  public MockEnvironmentBuilder setTaskStateManager(TaskStateManager taskStateManager) {
    this.taskStateManager = taskStateManager;
    return this;
  }

  public MockEnvironmentBuilder setAggregateManager(GlobalAggregateManager aggregateManager) {
    this.aggregateManager = aggregateManager;
    return this;
  }

  public MockEnvironmentBuilder setTaskConfiguration(Configuration taskConfiguration) {
    this.taskConfiguration = taskConfiguration;
    return this;
  }

  public MockEnvironmentBuilder setExecutionConfig(ExecutionConfig executionConfig) {
    this.executionConfig = executionConfig;
    return this;
  }

  public MockEnvironmentBuilder setTaskManagerRuntimeInfo(TaskManagerRuntimeInfo taskManagerRuntimeInfo) {
    this.taskManagerRuntimeInfo = taskManagerRuntimeInfo;
    return this;
  }

  public MockEnvironmentBuilder setMaxParallelism(int maxParallelism) {
    this.maxParallelism = maxParallelism;
    return this;
  }

  public MockEnvironmentBuilder setParallelism(int parallelism) {
    this.parallelism = parallelism;
    return this;
  }

  public MockEnvironmentBuilder setSubtaskIndex(int subtaskIndex) {
    this.subtaskIndex = subtaskIndex;
    return this;
  }

  public MockEnvironmentBuilder setUserCodeClassLoader(ClassLoader userCodeClassLoader) {
    this.userCodeClassLoader = TestingUserCodeClassLoader.newBuilder().setClassLoader(userCodeClassLoader).build();
    return this;
  }

  public MockEnvironmentBuilder setJobID(JobID jobID) {
    this.jobID = jobID;
    return this;
  }

  public MockEnvironmentBuilder setJobVertexID(JobVertexID jobVertexID) {
    this.jobVertexID = jobVertexID;
    return this;
  }

  public MockEnvironmentBuilder setMetricGroup(TaskMetricGroup taskMetricGroup) {
    this.taskMetricGroup = taskMetricGroup;
    return this;
  }

  public MockEnvironmentBuilder setIOManager(IOManager ioManager) {
    this.ioManager = ioManager;
    return this;
  }

  public MockEnvironmentBuilder setMemoryManager(MemoryManager memoryManager) {
    this.memoryManager = memoryManager;
    return this;
  }

  public MockEnvironmentBuilder setExternalResourceInfoProvider(ExternalResourceInfoProvider externalResourceInfoProvider) {
    this.externalResourceInfoProvider = externalResourceInfoProvider;
    return this;
  }

  public MockEnvironmentBuilder setGlobalAggregateManager(GlobalAggregateManager globalAggregateManager) {
    this.aggregateManager = globalAggregateManager;
    return this;
  }

  public MockEnvironment build() {
    if (this.ioManager == null) {
      this.ioManager = new IOManagerAsync();
    }

    return new MockEnvironmentArctic(
        this.jobID,
        this.jobVertexID,
        this.taskName,
        this.inputSplitProvider,
        this.bufferSize,
        this.taskConfiguration,
        this.executionConfig,
        this.ioManager,
        this.taskStateManager,
        this.aggregateManager,
        this.maxParallelism,
        this.parallelism,
        this.subtaskIndex,
        this.userCodeClassLoader,
        this.taskMetricGroup,
        this.taskManagerRuntimeInfo,
        this.memoryManager,
        this.externalResourceInfoProvider,
        this.throughputCalculator);
  }
}